21269552

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19841}}^1$

素因数の和:19916

約数の個数: 20

約数和(自身を含む): 41826936

約数和(自身を除く): 20557384

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19841, 39682, 79364, 158728, 317456, 1329347, 2658694, 5317388, 10634776, 21269552]

約数ペア:

[(1, 21269552), (2, 10634776), (4, 5317388), (8, 2658694), (16, 1329347), (67, 317456), (134, 158728), (268, 79364), (536, 39682), (1072, 19841)]